Farmers Weekly has joined forces with BASF to bring you an app for the iPhone that instantly measures green area index in oilseed rape crops. Click here to find out more.
1: After downloading the app from iTunes, tap the icon to launch the app.
2: The app home page will show latest messages and in-season advice, as well as recent photos, from which the GAI reading can be calculated. Along the bottom of the page are five navigation icons that allow the user to switch between taking a photo, viewing stored photos, accessing messages and further information.
3: By tapping the capture photo icon, you access a screen from which you can take a new picture.
4: The picture is taken using the iPhone's camera, and ideally needs to capture about 1m of crop. The app then calculates the GAI virtually instantly, even if there is no signal.
5: Reference photos can be found by tapping the info centre icon, as well as links to the BASF and Farmers Weekly web sites.
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